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【简答题】
用“五点法”作函数y=2sin（2x- π 3 ）的简图时，五个的坐标分别是______．
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皮皮学刷刷变学霸
举一反三
【单选题】下列不属于气雾剂抛射剂要求的是（）
A.
不易燃、不易爆
B.
无色、无臭、无味、无毒、无刺激性、无致敏反应
C.
相对密度大
D.
常压下沸点低于室温
E.
常温下蒸气压大于大气压
【简答题】A．People always want to watch short news in the prime time. B．The advertisers control what is shown on television. C．The audience research company offers the free information. D．Television companies m...
【简答题】Look at your watch for just one minute. During that short period of time, the population of the world had increased by eighty-five people. Perhaps you think 【S1】______ that isn't much. In the next hou...
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